$data.Entity.extend('Contact', {
	id: { type: 'int', key: true,computed: true },
	type_demande:{type: 'string',required: true },
	message:{type:'string',required: true },
	qcm_id: { type: 'int'},
	utilisateur_id: { type: 'int',required: true} 
});

function getValueContacts(BD,champs,valeur){
	return BD.Demandes_Contacts.filter('it.'+champs+' == '+valeur).toArray();
}